Vania



(No Model.)

M. JACKSON 8u A. TAYLOR.

.PADLOOK.

No. 572,115. Patented Dec. .1, 1896.

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UNITED STATES PATENT OFFICE.

MILTON JACKSON AND ALBERT TAYLOR, OF PHILADELPHIA, PENN SYL- VANIA, ASSIGNORS TO THE D. K. MILLER LOCK COMPANY, SAME PLACE.

PADLOCK.

SPECIFICATION forming part of Letters Patent No. 572,115, dated December 1, 1896.

Application filed July l, 1895. Serial No. 554,629. (No model.)

T o LU whom it nuty concern;

Be it known that we, MILTON J AcKsoN andVALBERT TAYLOR, citizens of the United States, and residents of Philadelphia, Pennsylvania, have invented certain Improvements in Padlocks, of which the following is a specification.

The object of our invention is to construct a cheap and simple form of automatic padlock, that is to say, a padlock in which the shackle is automatically projected as soon as unlocked, and is automatically engaged and held when again pushed inward. This obj ect we attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figure 1 is a longitudinal section of apadlock constructed in accordance with our invention, showing the same locked. Fig. 2 is a similar view showing the lock open. Fig. 3 is a transverse section of the lock on the line 3 3, Fig. 1. Fig. 4 is a sectional plan view on the line a 4, Fig. l. Figs. 5 and 6 are perspective views of the two parts of the lockcase, and Fig. 7 is a perspective view of part of the locking mechanism.

The casing of the lock is constructed of two halves a c', each struck up from sheet metal and held together by suitable transverse pins or rivets a2, the edges of the two halves of the case meeting centrally at the bottom and sides of the lock, as shown in Figs. 3 and 4, but the top plate a3 of the casing being formed wholly upon the halt` c, so that the shackleopenings will be formed in a single plate.

The shackle B of the lock has a long leg l), guided in an opening in the top plate a3 ot' the casing and in a projection d within the lock, the short leg l1 of the shackle being adapted to enter an opening b2 in the top plate co3 of the casing when the lock is closed.

The shackle is projected by one arm j" of a spring f, which is coiled around one of the rivets 0,2 of the case, a suitable lug d upon the leg b of the shackle serving, by Contact with the guide-lug cl, to limit the extent of projection of said shackle under the action of the spring-arm f.

To a pin g within the casin g are hung a series of tumblers D, which are normally depressed by means of springs h, and between these tumblers and one side of the lock is interposed a locking-plate F, which has a felice t' for entering the notches t" of the tumblers when the latter have been brought into line by the action of the key, said locking-plate also having a stump m, which is adapted to enter a notch m in the long legb of the shackle, so as to retain the latter in the depressed position, the locking-plate being so moved by an arm f2 of the spring f as to cause its stump to normally engage with said notch in the shackle. On the locking-plate, however, is a shoulder 'n forengagement with one of the bits of the key, and -when said key has been turned so as to bring the notches 0I" all of the tumblers into line with the fence 2l further movement of the key will cause the rearward sliding movement of the plate F, so as to carry its fence into the notches of the tumblers and withdraw its stump m from engagement with the notch m' of theshackle, thereby permitting the projection of the latter by the springarm f', as shown in Fig. 2.

To lessen the friction caused by the backand-forth movement of the plate F, the latter has struck up fromit a series of lugs or teats s, which bear against the back of the case and serve as bearings for the plate thereon.

In order to relock the shackle, it is only necessary to press the same inward until the end of its short leg b' enters the opening b2 in the top of the casing, the recess m being then in line with the stump m of the locking-plate, so that the latter is at once projected by the spring-arm f2, and the fence t' is withdrawn from the notches of the tumblers, thereby permitting the restoration of the latter by the springs h to the normal or locked position, as shown in Fig. l.

A stud t extends across the case from the back plate to the front plate some distance below the key-hub G, which is slotted, as usual, for the entrance of an ordinary iiat key, and is reduced in diameter at each end so as to turn in bearings in the front and back of the casing, the stud t serving asa bearing for the.

IOO

be readily punched from sheet metal, so that the' lock can be made at small cost, While at the same time it is extremely strong and compact.

Having thus described our invention, We claim and desire to secure by Letters Patentl. A padlock-casing comprising front and rear halves each consisting of a plate of sheet metal struck up so as to form edge flanges which at the sides and bottom of the casing meet at about the transverse center of the same, the top plate being Jformed Wholly upon one-half of the casing, substantially as specified.

2. The combination of the casing, With the sliding shackle, the spring for projecting the same, the pivot-ed tumblers having notches in their outer edges and the sliding lockingplate having a fence for entering the notches in the tumblers, and a stump for engaging with a notch in the shackle, said lockingplate being moved in one direction by a spring, and in the opposite direction by the key, substantially as specified.

3. The combination of the lock-casing, the shackle, the pivoted tumblers, the sliding locking-plate, the key-hub mounted in the casing and a key-guiding stud extending across the casing below said key-hub, and parallel with the slot therein, substantially as specified.

In testimony whereof We have signed ou names to this speciiication in the presence of two subscribing Witnesses,

MILTON JACKSON.

ALBERT TAYLOR.

Vitnesses: GEORGE L. BATTERSBY, J ULIA TAYLOR. 

